package PTA2.ti67;
import java.util.Scanner;

/**
 * @author Lenovo
 */
public class demo67 {
        public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);
            int n = scanner.nextInt();
            scanner.close();

            int sum = 0;
            StringBuilder expression = new StringBuilder();

            for (int i = 1; i <= n; i++) {
                sum += i;
                if (i == n) {
                    expression.append(i);
                } else {
                    expression.append(i).append("+");
                }
            }

            expression.append("=").append(sum);
            System.out.println(expression.toString());
        }
    }

